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/*
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* TI TSC2005 emulator.
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*
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* Copyright (c) 2006 Andrzej Zaborowski <balrog@zabor.org>
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* Copyright (C) 2008 Nokia Corporation
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 or
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* (at your option) version 3 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "hw.h" |
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#include "qemu-timer.h" |
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#include "console.h" |
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#include "devices.h" |
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|
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#define TSC_CUT_RESOLUTION(value, p) ((value) >> (16 - (p ? 12 : 10))) |
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typedef struct { |
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qemu_irq pint; /* Combination of the nPENIRQ and DAV signals */
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QEMUTimer *timer; |
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uint16_t model; |
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int x, y;
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int pressure;
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int state, reg, irq, command;
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uint16_t data, dav; |
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int busy;
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int enabled;
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int host_mode;
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int function;
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int nextfunction;
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int precision;
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int nextprecision;
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int filter;
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int pin_func;
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int timing[2]; |
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int noise;
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int reset;
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int pdst;
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int pnd0;
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uint16_t temp_thr[2];
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uint16_t aux_thr[2];
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int tr[8]; |
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} TSC2005State; |
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enum {
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TSC_MODE_XYZ_SCAN = 0x0,
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TSC_MODE_XY_SCAN, |
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TSC_MODE_X, |
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TSC_MODE_Y, |
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TSC_MODE_Z, |
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TSC_MODE_AUX, |
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TSC_MODE_TEMP1, |
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TSC_MODE_TEMP2, |
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TSC_MODE_AUX_SCAN, |
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TSC_MODE_X_TEST, |
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TSC_MODE_Y_TEST, |
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TSC_MODE_TS_TEST, |
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TSC_MODE_RESERVED, |
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TSC_MODE_XX_DRV, |
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TSC_MODE_YY_DRV, |
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TSC_MODE_YX_DRV, |
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}; |
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static const uint16_t mode_regs[16] = { |
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0xf000, /* X, Y, Z scan */ |
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0xc000, /* X, Y scan */ |
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0x8000, /* X */ |
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0x4000, /* Y */ |
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0x3000, /* Z */ |
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0x0800, /* AUX */ |
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0x0400, /* TEMP1 */ |
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0x0200, /* TEMP2 */ |
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0x0800, /* AUX scan */ |
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0x0040, /* X test */ |
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0x0020, /* Y test */ |
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0x0080, /* Short-circuit test */ |
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0x0000, /* Reserved */ |
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0x0000, /* X+, X- drivers */ |
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0x0000, /* Y+, Y- drivers */ |
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0x0000, /* Y+, X- drivers */ |
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}; |
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#define X_TRANSFORM(s) \
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((s->y * s->tr[0] - s->x * s->tr[1]) / s->tr[2] + s->tr[3]) |
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#define Y_TRANSFORM(s) \
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((s->y * s->tr[4] - s->x * s->tr[5]) / s->tr[6] + s->tr[7]) |
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#define Z1_TRANSFORM(s) \
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((400 - ((s)->x >> 7) + ((s)->pressure << 10)) << 4) |
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#define Z2_TRANSFORM(s) \
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((4000 + ((s)->y >> 7) - ((s)->pressure << 10)) << 4) |
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|
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#define AUX_VAL (700 << 4) /* +/- 3 at 12-bit */ |
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#define TEMP1_VAL (1264 << 4) /* +/- 5 at 12-bit */ |
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#define TEMP2_VAL (1531 << 4) /* +/- 5 at 12-bit */ |
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static uint16_t tsc2005_read(TSC2005State *s, int reg) |
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{ |
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uint16_t ret; |
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|
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switch (reg) {
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case 0x0: /* X */ |
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s->dav &= ~mode_regs[TSC_MODE_X]; |
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return TSC_CUT_RESOLUTION(X_TRANSFORM(s), s->precision) +
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(s->noise & 3);
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case 0x1: /* Y */ |
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s->dav &= ~mode_regs[TSC_MODE_Y]; |
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s->noise ++; |
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return TSC_CUT_RESOLUTION(Y_TRANSFORM(s), s->precision) ^
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(s->noise & 3);
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case 0x2: /* Z1 */ |
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s->dav &= 0xdfff;
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return TSC_CUT_RESOLUTION(Z1_TRANSFORM(s), s->precision) -
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(s->noise & 3);
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case 0x3: /* Z2 */ |
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s->dav &= 0xefff;
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return TSC_CUT_RESOLUTION(Z2_TRANSFORM(s), s->precision) |
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(s->noise & 3);
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case 0x4: /* AUX */ |
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s->dav &= ~mode_regs[TSC_MODE_AUX]; |
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return TSC_CUT_RESOLUTION(AUX_VAL, s->precision);
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case 0x5: /* TEMP1 */ |
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s->dav &= ~mode_regs[TSC_MODE_TEMP1]; |
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return TSC_CUT_RESOLUTION(TEMP1_VAL, s->precision) -
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(s->noise & 5);
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case 0x6: /* TEMP2 */ |
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s->dav &= 0xdfff;
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s->dav &= ~mode_regs[TSC_MODE_TEMP2]; |
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return TSC_CUT_RESOLUTION(TEMP2_VAL, s->precision) ^
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(s->noise & 3);
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case 0x7: /* Status */ |
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ret = s->dav | (s->reset << 7) | (s->pdst << 2) | 0x0; |
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s->dav &= ~(mode_regs[TSC_MODE_X_TEST] | mode_regs[TSC_MODE_Y_TEST] | |
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mode_regs[TSC_MODE_TS_TEST]); |
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s->reset = 1;
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return ret;
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case 0x8: /* AUX high treshold */ |
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return s->aux_thr[1]; |
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case 0x9: /* AUX low treshold */ |
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return s->aux_thr[0]; |
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case 0xa: /* TEMP high treshold */ |
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return s->temp_thr[1]; |
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case 0xb: /* TEMP low treshold */ |
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return s->temp_thr[0]; |
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case 0xc: /* CFR0 */ |
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return (s->pressure << 15) | ((!s->busy) << 14) | |
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(s->nextprecision << 13) | s->timing[0]; |
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case 0xd: /* CFR1 */ |
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return s->timing[1]; |
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case 0xe: /* CFR2 */ |
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return (s->pin_func << 14) | s->filter; |
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case 0xf: /* Function select status */ |
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return s->function >= 0 ? 1 << s->function : 0; |
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} |
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/* Never gets here */
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return 0xffff; |
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} |
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static void tsc2005_write(TSC2005State *s, int reg, uint16_t data) |
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{ |
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switch (reg) {
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case 0x8: /* AUX high treshold */ |
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s->aux_thr[1] = data;
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break;
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case 0x9: /* AUX low treshold */ |
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s->aux_thr[0] = data;
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break;
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case 0xa: /* TEMP high treshold */ |
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s->temp_thr[1] = data;
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break;
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case 0xb: /* TEMP low treshold */ |
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s->temp_thr[0] = data;
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break;
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case 0xc: /* CFR0 */ |
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s->host_mode = data >> 15;
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if (s->enabled != !(data & 0x4000)) { |
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s->enabled = !(data & 0x4000);
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fprintf(stderr, "%s: touchscreen sense %sabled\n",
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__FUNCTION__, s->enabled ? "en" : "dis"); |
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if (s->busy && !s->enabled)
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qemu_del_timer(s->timer); |
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s->busy &= s->enabled; |
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} |
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s->nextprecision = (data >> 13) & 1; |
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s->timing[0] = data & 0x1fff; |
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if ((s->timing[0] >> 11) == 3) |
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fprintf(stderr, "%s: illegal conversion clock setting\n",
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__FUNCTION__); |
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break;
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case 0xd: /* CFR1 */ |
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s->timing[1] = data & 0xf07; |
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break;
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case 0xe: /* CFR2 */ |
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s->pin_func = (data >> 14) & 3; |
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s->filter = data & 0x3fff;
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break;
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default:
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fprintf(stderr, "%s: write into read-only register %x\n",
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__FUNCTION__, reg); |
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} |
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} |
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/* This handles most of the chip's logic. */
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static void tsc2005_pin_update(TSC2005State *s) |
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{ |
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int64_t expires; |
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int pin_state;
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switch (s->pin_func) {
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case 0: |
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pin_state = !s->pressure && !!s->dav; |
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break;
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case 1: |
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case 3: |
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default:
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pin_state = !s->dav; |
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break;
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case 2: |
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pin_state = !s->pressure; |
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} |
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if (pin_state != s->irq) {
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s->irq = pin_state; |
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qemu_set_irq(s->pint, s->irq); |
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} |
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switch (s->nextfunction) {
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case TSC_MODE_XYZ_SCAN:
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case TSC_MODE_XY_SCAN:
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if (!s->host_mode && s->dav)
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s->enabled = 0;
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if (!s->pressure)
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return;
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/* Fall through */
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case TSC_MODE_AUX_SCAN:
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break;
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case TSC_MODE_X:
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case TSC_MODE_Y:
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case TSC_MODE_Z:
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if (!s->pressure)
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return;
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/* Fall through */
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case TSC_MODE_AUX:
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case TSC_MODE_TEMP1:
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case TSC_MODE_TEMP2:
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case TSC_MODE_X_TEST:
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case TSC_MODE_Y_TEST:
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case TSC_MODE_TS_TEST:
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if (s->dav)
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s->enabled = 0;
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break;
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case TSC_MODE_RESERVED:
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case TSC_MODE_XX_DRV:
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case TSC_MODE_YY_DRV:
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case TSC_MODE_YX_DRV:
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default:
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return;
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} |
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if (!s->enabled || s->busy)
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return;
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s->busy = 1;
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s->precision = s->nextprecision; |
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s->function = s->nextfunction; |
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s->pdst = !s->pnd0; /* Synchronised on internal clock */
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expires = qemu_get_clock(vm_clock) + (ticks_per_sec >> 7);
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qemu_mod_timer(s->timer, expires); |
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} |
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static void tsc2005_reset(TSC2005State *s) |
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{ |
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s->state = 0;
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s->pin_func = 0;
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s->enabled = 0;
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s->busy = 0;
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s->nextprecision = 0;
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s->nextfunction = 0;
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s->timing[0] = 0; |
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s->timing[1] = 0; |
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s->irq = 0;
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s->dav = 0;
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s->reset = 0;
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s->pdst = 1;
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s->pnd0 = 0;
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s->function = -1;
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s->temp_thr[0] = 0x000; |
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s->temp_thr[1] = 0xfff; |
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s->aux_thr[0] = 0x000; |
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s->aux_thr[1] = 0xfff; |
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tsc2005_pin_update(s); |
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} |
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|
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static uint8_t tsc2005_txrx_word(void *opaque, uint8_t value) |
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{ |
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TSC2005State *s = opaque; |
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uint32_t ret = 0;
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switch (s->state ++) {
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case 0: |
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if (value & 0x80) { |
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/* Command */
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if (value & (1 << 1)) |
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tsc2005_reset(s); |
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else {
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s->nextfunction = (value >> 3) & 0xf; |
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s->nextprecision = (value >> 2) & 1; |
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if (s->enabled != !(value & 1)) { |
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s->enabled = !(value & 1);
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fprintf(stderr, "%s: touchscreen sense %sabled\n",
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__FUNCTION__, s->enabled ? "en" : "dis"); |
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if (s->busy && !s->enabled)
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qemu_del_timer(s->timer); |
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s->busy &= s->enabled; |
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} |
343 |
tsc2005_pin_update(s); |
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} |
345 |
|
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s->state = 0;
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} else if (value) { |
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/* Data transfer */
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s->reg = (value >> 3) & 0xf; |
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s->pnd0 = (value >> 1) & 1; |
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s->command = value & 1;
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|
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if (s->command) {
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/* Read */
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s->data = tsc2005_read(s, s->reg); |
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tsc2005_pin_update(s); |
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} else
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s->data = 0;
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} else
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s->state = 0;
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break;
|
362 |
|
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case 1: |
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if (s->command)
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ret = (s->data >> 8) & 0xff; |
366 |
else
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s->data |= value << 8;
|
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break;
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|
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case 2: |
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if (s->command)
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ret = s->data & 0xff;
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else {
|
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s->data |= value; |
375 |
tsc2005_write(s, s->reg, s->data); |
376 |
tsc2005_pin_update(s); |
377 |
} |
378 |
|
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s->state = 0;
|
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break;
|
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} |
382 |
|
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return ret;
|
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} |
385 |
|
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uint32_t tsc2005_txrx(void *opaque, uint32_t value, int len) |
387 |
{ |
388 |
uint32_t ret = 0;
|
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|
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len &= ~7;
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while (len > 0) { |
392 |
len -= 8;
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ret |= tsc2005_txrx_word(opaque, (value >> len) & 0xff) << len;
|
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} |
395 |
|
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return ret;
|
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} |
398 |
|
399 |
static void tsc2005_timer_tick(void *opaque) |
400 |
{ |
401 |
TSC2005State *s = opaque; |
402 |
|
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/* Timer ticked -- a set of conversions has been finished. */
|
404 |
|
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if (!s->busy)
|
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return;
|
407 |
|
408 |
s->busy = 0;
|
409 |
s->dav |= mode_regs[s->function]; |
410 |
s->function = -1;
|
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tsc2005_pin_update(s); |
412 |
} |
413 |
|
414 |
static void tsc2005_touchscreen_event(void *opaque, |
415 |
int x, int y, int z, int buttons_state) |
416 |
{ |
417 |
TSC2005State *s = opaque; |
418 |
int p = s->pressure;
|
419 |
|
420 |
if (buttons_state) {
|
421 |
s->x = x; |
422 |
s->y = y; |
423 |
} |
424 |
s->pressure = !!buttons_state; |
425 |
|
426 |
/*
|
427 |
* Note: We would get better responsiveness in the guest by
|
428 |
* signaling TS events immediately, but for now we simulate
|
429 |
* the first conversion delay for sake of correctness.
|
430 |
*/
|
431 |
if (p != s->pressure)
|
432 |
tsc2005_pin_update(s); |
433 |
} |
434 |
|
435 |
static void tsc2005_save(QEMUFile *f, void *opaque) |
436 |
{ |
437 |
TSC2005State *s = (TSC2005State *) opaque; |
438 |
int i;
|
439 |
|
440 |
qemu_put_be16(f, s->x); |
441 |
qemu_put_be16(f, s->y); |
442 |
qemu_put_byte(f, s->pressure); |
443 |
|
444 |
qemu_put_byte(f, s->state); |
445 |
qemu_put_byte(f, s->reg); |
446 |
qemu_put_byte(f, s->command); |
447 |
|
448 |
qemu_put_byte(f, s->irq); |
449 |
qemu_put_be16s(f, &s->dav); |
450 |
qemu_put_be16s(f, &s->data); |
451 |
|
452 |
qemu_put_timer(f, s->timer); |
453 |
qemu_put_byte(f, s->enabled); |
454 |
qemu_put_byte(f, s->host_mode); |
455 |
qemu_put_byte(f, s->function); |
456 |
qemu_put_byte(f, s->nextfunction); |
457 |
qemu_put_byte(f, s->precision); |
458 |
qemu_put_byte(f, s->nextprecision); |
459 |
qemu_put_be16(f, s->filter); |
460 |
qemu_put_byte(f, s->pin_func); |
461 |
qemu_put_be16(f, s->timing[0]);
|
462 |
qemu_put_be16(f, s->timing[1]);
|
463 |
qemu_put_be16s(f, &s->temp_thr[0]);
|
464 |
qemu_put_be16s(f, &s->temp_thr[1]);
|
465 |
qemu_put_be16s(f, &s->aux_thr[0]);
|
466 |
qemu_put_be16s(f, &s->aux_thr[1]);
|
467 |
qemu_put_be32(f, s->noise); |
468 |
qemu_put_byte(f, s->reset); |
469 |
qemu_put_byte(f, s->pdst); |
470 |
qemu_put_byte(f, s->pnd0); |
471 |
|
472 |
for (i = 0; i < 8; i ++) |
473 |
qemu_put_be32(f, s->tr[i]); |
474 |
} |
475 |
|
476 |
static int tsc2005_load(QEMUFile *f, void *opaque, int version_id) |
477 |
{ |
478 |
TSC2005State *s = (TSC2005State *) opaque; |
479 |
int i;
|
480 |
|
481 |
s->x = qemu_get_be16(f); |
482 |
s->y = qemu_get_be16(f); |
483 |
s->pressure = qemu_get_byte(f); |
484 |
|
485 |
s->state = qemu_get_byte(f); |
486 |
s->reg = qemu_get_byte(f); |
487 |
s->command = qemu_get_byte(f); |
488 |
|
489 |
s->irq = qemu_get_byte(f); |
490 |
qemu_get_be16s(f, &s->dav); |
491 |
qemu_get_be16s(f, &s->data); |
492 |
|
493 |
qemu_get_timer(f, s->timer); |
494 |
s->enabled = qemu_get_byte(f); |
495 |
s->host_mode = qemu_get_byte(f); |
496 |
s->function = qemu_get_byte(f); |
497 |
s->nextfunction = qemu_get_byte(f); |
498 |
s->precision = qemu_get_byte(f); |
499 |
s->nextprecision = qemu_get_byte(f); |
500 |
s->filter = qemu_get_be16(f); |
501 |
s->pin_func = qemu_get_byte(f); |
502 |
s->timing[0] = qemu_get_be16(f);
|
503 |
s->timing[1] = qemu_get_be16(f);
|
504 |
qemu_get_be16s(f, &s->temp_thr[0]);
|
505 |
qemu_get_be16s(f, &s->temp_thr[1]);
|
506 |
qemu_get_be16s(f, &s->aux_thr[0]);
|
507 |
qemu_get_be16s(f, &s->aux_thr[1]);
|
508 |
s->noise = qemu_get_be32(f); |
509 |
s->reset = qemu_get_byte(f); |
510 |
s->pdst = qemu_get_byte(f); |
511 |
s->pnd0 = qemu_get_byte(f); |
512 |
|
513 |
for (i = 0; i < 8; i ++) |
514 |
s->tr[i] = qemu_get_be32(f); |
515 |
|
516 |
s->busy = qemu_timer_pending(s->timer); |
517 |
tsc2005_pin_update(s); |
518 |
|
519 |
return 0; |
520 |
} |
521 |
|
522 |
void *tsc2005_init(qemu_irq pintdav)
|
523 |
{ |
524 |
TSC2005State *s; |
525 |
|
526 |
s = (TSC2005State *) |
527 |
qemu_mallocz(sizeof(TSC2005State));
|
528 |
s->x = 400;
|
529 |
s->y = 240;
|
530 |
s->pressure = 0;
|
531 |
s->precision = s->nextprecision = 0;
|
532 |
s->timer = qemu_new_timer(vm_clock, tsc2005_timer_tick, s); |
533 |
s->pint = pintdav; |
534 |
s->model = 0x2005;
|
535 |
|
536 |
s->tr[0] = 0; |
537 |
s->tr[1] = 1; |
538 |
s->tr[2] = 1; |
539 |
s->tr[3] = 0; |
540 |
s->tr[4] = 1; |
541 |
s->tr[5] = 0; |
542 |
s->tr[6] = 1; |
543 |
s->tr[7] = 0; |
544 |
|
545 |
tsc2005_reset(s); |
546 |
|
547 |
qemu_add_mouse_event_handler(tsc2005_touchscreen_event, s, 1,
|
548 |
"QEMU TSC2005-driven Touchscreen");
|
549 |
|
550 |
qemu_register_reset((void *) tsc2005_reset, s);
|
551 |
register_savevm("tsc2005", -1, 0, tsc2005_save, tsc2005_load, s); |
552 |
|
553 |
return s;
|
554 |
} |
555 |
|
556 |
/*
|
557 |
* Use tslib generated calibration data to generate ADC input values
|
558 |
* from the touchscreen. Assuming 12-bit precision was used during
|
559 |
* tslib calibration.
|
560 |
*/
|
561 |
void tsc2005_set_transform(void *opaque, MouseTransformInfo *info) |
562 |
{ |
563 |
TSC2005State *s = (TSC2005State *) opaque; |
564 |
|
565 |
/* This version assumes touchscreen X & Y axis are parallel or
|
566 |
* perpendicular to LCD's X & Y axis in some way. */
|
567 |
if (abs(info->a[0]) > abs(info->a[1])) { |
568 |
s->tr[0] = 0; |
569 |
s->tr[1] = -info->a[6] * info->x; |
570 |
s->tr[2] = info->a[0]; |
571 |
s->tr[3] = -info->a[2] / info->a[0]; |
572 |
s->tr[4] = info->a[6] * info->y; |
573 |
s->tr[5] = 0; |
574 |
s->tr[6] = info->a[4]; |
575 |
s->tr[7] = -info->a[5] / info->a[4]; |
576 |
} else {
|
577 |
s->tr[0] = info->a[6] * info->y; |
578 |
s->tr[1] = 0; |
579 |
s->tr[2] = info->a[1]; |
580 |
s->tr[3] = -info->a[2] / info->a[1]; |
581 |
s->tr[4] = 0; |
582 |
s->tr[5] = -info->a[6] * info->x; |
583 |
s->tr[6] = info->a[3]; |
584 |
s->tr[7] = -info->a[5] / info->a[3]; |
585 |
} |
586 |
|
587 |
s->tr[0] >>= 11; |
588 |
s->tr[1] >>= 11; |
589 |
s->tr[3] <<= 4; |
590 |
s->tr[4] >>= 11; |
591 |
s->tr[5] >>= 11; |
592 |
s->tr[7] <<= 4; |
593 |
} |